Turbo Temp

[MikeHTally]

Bought this new laser temp reader gadget last weekend. Figured I'd try it out a bit. Pic of the turbo reading soon after shut down.

 

[ms3brendan]

Dang. I feel SO bad for my turbo.. Haha.

 

[SallySpeed3]

wow holy crap

 

[Darth Vader]

That's jack. Most OTR trucks run the turbo to red hot and glowing on the hot side under load. I've seen some pushed so hard the turbine housing had melt damage and the exhaust pipe was heat-stained for 2 yards, on a diesel!? Look up what it takes to melt cast iron, lol

 

[MSMS3]

True exhaust gas temperatures and, therefore, housing temperatures inside of the turbo via thermal conduction are likely to approach 1600 degrees at 6,000 rpm when the turbo is under full load, as in 4th through 6th gear. That is normal. Once the cast iron housing gets heated all the way through, temps on the surface can be close to those inside, even with a water jacket built into the housing.

There is heat shielding around the turbo and the downpipe for a very good reason.

600 degrees is more like the temp on cooled down turbo with the engine still running.

I run a catless exhaust system. The outside of my stainless exhaust tip is discolored in a bluish, yellowish, orangish range from heat (like color case hardening on firearms) even that far back. See attached photo. Some guys pay extra for fake "burnt exhaust" tips. Run the extra heat of a catless system with a single wall exhaust tip, do a little "spirited driving" in the upper gears and get the real thing, rather than just the "look."

Turbocharged engines under load and pushing the outer limits of their thermal efficiency range produce a LOT of heat.

 

[Darth Vader]

The best part about catless is it allows far greater thermal expansion of the exhaust gases and this, at least as much as the cfm increases of the pipe, gives the extra power. Big, fat cats are a ginormous heat sink under the hood and steal that energy away heating up plates and precious metals.